Use WHATWG URL parsing, if available, instead of url.parse

lib/ConnectionConfig.js

@@ -177,21 +177,36 @@ ConnectionConfig.parseFlagList = function parseFlagList(flagList) {
 };
 
 ConnectionConfig.parseUrl = function(url) {
-  url = urlParse(url, true);
+  url = (typeof URL == 'function' && typeof URL.prototype == 'object' ? new URL(url) : urlParse(url, true));
 
   var options = {
     host     : url.hostname,
     port     : url.port,
     database : url.pathname.substr(1)
   };
 
-  if (url.auth) {
+  if (typeof url.username == 'string') {
+    options.user     = url.username;
+    options.password = url.password;
+  } else if (url.auth) {
     var auth = url.auth.split(':');
     options.user     = auth.shift();
     options.password = auth.join(':');
   }
 
-  if (url.query) {
+  if (url.searchParams) {
+    for (var key in url.searchParams) {
+      var value = url.searchParams[key];
+
+      try {
+        // Try to parse this as a JSON expression first
+        options[key] = JSON.parse(value);
+      } catch (err) {
+        // Otherwise assume it is a plain string
+        options[key] = value;
+      }
+    }
+  } else if (url.query) {
     for (var key in url.query) {
       var value = url.query[key];